Init new cli command 'case'

Author: Eroui

commands/case.go

@@ -0,0 +1,70 @@
+package commands 
+
+import (
+	"bufio"
+	"github.com/fatih/color"
+	"github.com/urfave/cli/v2"
+	"fmt"
+    "os"
+)
+
+func readFromStdin() ([]string, error) {
+	scn := bufio.NewScanner(os.Stdin)
+	var lines []string
+	for scn.Scan() {
+		line := scn.Text()
+		if len(line) == 1 {
+			// Group Separator (GS ^]): ctrl-]
+			if line[0] == '\x1D' {
+				break
+			}
+		}
+		lines = append(lines, line)
+	}
+	
+	// TODO add check for errors
+	return lines, nil
+}
+
+func writeLinesToFile(filename string, lines []string) {
+	f, err := os.Create(filename)
+	if err != nil {
+        fmt.Println(err)
+        return
+	}
+
+	for _, line := range lines {
+        fmt.Fprintln(f, line)
+        if err != nil {
+            fmt.Println(err)
+            return
+        }
+    }
+}
+
+
+// TODO(Eroui): add checks on errors
+func CustomCaseAction(context *cli.Context) error {
+	color.Green("Creating Custom Test Case...")
+	
+	color.Green("Provide your input:")
+	input_lines, _ := readFromStdin()
+
+	color.Green("Provide your output:")
+	output_lines, _ := readFromStdin()
+
+	writeLinesToFile("sample.in", input_lines)
+	writeLinesToFile("sample.out", output_lines)
+	
+	color.Green("Created Custom Test Case...")
+	return nil
+}
+
+var CaseCommand = cli.Command{
+	Name:		"case",
+	Aliases:	[]string{"c"},
+	Usage:		"Create a custom test case.",
+	UsageText:	"Add custom test cases to egor task.",
+	Action: 	CustomCaseAction,
+	// TODO(Eroui): add necessary flags
+}

main.go

@@ -42,6 +42,7 @@ func main() {
 		UsageText:   "Run egor <subcommand> [--flags]*",
 		Commands: []*cli.Command{
 			&commands.ParseCommand,
+			&commands.CaseCommand,
 		},
 	}